<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            margin-top: 10px;
        }
        .box1{
           
            /* display: none; */
             width: 100px;
            height: 100px;
            background-color: red;
           /* visibility: hidden; */
        }
        .box2{
            width: 100px;
            height: 100px;
            background-color: blue; 
        }
        .box1:hover{
            /*display: none; */
            display: none;
        }
    </style>
</head>
<body>
    <!--显示与隐藏
       display:none ---消失   display:block
       visibility:hidden ---隐藏
    -->
    
</body>
</html>